根据经纬度获取两点之间的距离（php&mysql）

php

01 //根据经纬度计算距离,单位公里（1000米） 02 function getdistance($lng1,$lat1,$lng2,$lat2){ 03 //将角度转为狐度 04 $radLat1=deg2rad($lat1); 05 $radLat2=deg2rad($lat2); 06 $radLng1=deg2rad($lng1); 07 $radLng2=deg2rad($lng2); 08 $a=$radLat1-$radLat2;//两纬度之差,纬度<90 09 $b=$radLng1-$radLng2;//两经度之差纬度<180 10 $s=2*asin(sqrt(pow(sin($a/2),2)+cos($radLat1)*cos($radLat2)*pow(sin($b/2),2)))*6378.137; 11 return $s; 12 }

mysql函数

01 DELIMITER $$ 02 03 CREATE DEFINER=`root`@`%` FUNCTION `GETDISTANCE`(lat1 DOUBLE, lng1 DOUBLE, lat2 DOUBLE, lng2 DOUBLE) RETURNS double 04 05 READS SQL DATA 06 07 DETERMINISTIC 08 09 BEGIN 10 11 DECLARE RAD DOUBLE; 12 13 DECLARE EARTH_RADIUS DOUBLE DEFAULT 6378137; 14 15 DECLARE radLat1 DOUBLE; 16 17 DECLARE radLat2 DOUBLE; 18 19 DECLARE radLng1 DOUBLE; 20 21 DECLARE radLng2 DOUBLE; 22 23 DECLARE s DOUBLE; 24 25 SET RAD = PI() / 180.0; 26 27 SET radLat1 = lat1 * RAD; 28 29 SET radLat2 = lat2 * RAD; 30 31 SET radLng1 = lng1 * RAD; 32 33 SET radLng2 = lng2 * RAD; 34 35 SET s = ACOS(COS(radLat1)*COS(radLat2)*COS(radLng1-radLng2)+SIN(radLat1)*SIN(radLat2))*EARTH_RADIUS; 36 37 SET s = ROUND(s * 10000) / 10000; 38 39 RETURN s; 40 41 END$$ 42 43 DELIMITER ;

调用方法

1 SELECT *,latitude,longitude,GETDISTANCE(latitude,longitude,30.663262,104.071619) AS distance FROM mb_shop_ext where 1 HAVING distance<1000 ORDER BY distance ASC LIMIT 0,10